Security readout for executives and security teams
Plain-English summary
CVE-2026-22809 affects tarteaucitron.js, a cookie banner library. Versions before 1.29.0 can be forced into excessive processing through the issuu_id parameter, causing denial of service. The published severity is medium, and the vulnerability is fixed in version 1.29.0.
Executive priority
Treat as a routine but time-bound availability fix. Prioritize public websites or high-traffic services using tarteaucitron.js, especially where service disruption would affect compliance messaging, user trust, or business operations.
Technical view
The issue is a Regular Expression Denial of Service vulnerability, CWE-1333, in tarteaucitron.js before 1.29.0. The CVSS 3.1 score is 4.4 with local attack vector, low complexity, high privileges, no user interaction, and high availability impact only. The fix is linked in the upstream commit.
Likely exposure
Organizations are exposed if they bundle, host, or depend on tarteaucitron.js versions earlier than 1.29.0. Practical exposure depends on whether the vulnerable issuu_id handling is reachable in the deployed configuration. No affected CPEs were provided in the source data.
Exploitation context
The sources do not report active exploitation, and this CVE is not listed as KEV in the provided data. The CVSS vector indicates exploitation requires local access and high privileges, limiting broad remote risk, but availability impact can be high where the vulnerable code is reachable.
Researcher notes
Evidence is limited to the CVE record, GitHub advisory, and fixing commit. Do not assume broader product impact beyond tarteaucitron.js before 1.29.0. The unusual local, high-privilege CVSS vector should be considered when assessing real-world reachability.
Mitigation direction
- Upgrade tarteaucitron.js to version 1.29.0 or later.
- Review vendor advisory and commit notes before deployment.
- Rebuild and redeploy assets that bundle the vulnerable library.
- If immediate upgrade is blocked, check vendor guidance for supported workarounds.
Validation and detection
- Inventory applications and websites using tarteaucitron.js.
- Check package manifests, lockfiles, and bundled static assets for versions below 1.29.0.
- Confirm deployed assets reference the updated library after remediation.
- Review whether issuu-related functionality is enabled or reachable.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-1333: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-22809 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H0.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/AmauriC/tarteaucitron.js/security/advisories/GHSA-q5f6-qxm2-mcqmCVE reference · x_refsource_CONFIRM
- https://github.com/AmauriC/tarteaucitron.js/commit/f0bbdac2fdf3cd24a325fc0928c0d34abf1b7b52CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Inefficient Regular Expression Complexity
Inefficient Regular Expression Complexity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.